Speed-governor



(No Mode.) Y

F. A. GALE.

SPEED GOVERNOR.

110.301,'712. Patented July 8, 1884A VE tuA 1 r1 M MM m z5 faQ.

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speed of such governor.

UNITED STATES PATENT @Erica FRANK A. GALE, OF LOVELL, MASSACHUSETTS.

SPEED-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 301,712, dated July 8, 1884. l

Application tiled January 10, 1884. (No model.)

To @ZZ whom, it may concern,.-

Be it known that I, FRANK. A. GALE, a citizen of the United States, residing at Lowell, in the county of Middlesex and-Commonwealth of Massachusetts, have invented certain new and useful Improvements in Speed-Governors, of which the following is a specification.

My invention relates to devices to be used, in connection with the speed governors of steam, water, and other motors and engines, to render the speed uniform undera variation of load, such. devices being applicable to any governor 4which can be so connected with a shaft as to rock the same by the variation of the In the accompanying drawings, Figures l and 2 are respectively a front and a side elevation of a centrifugal Lor ball governor such as is commonly used with steam-engines, its stand, the puley which drives the governor, miter-gears, the cut-oft shaft, the arm usually secured thereto, part of the cut-off rods and dash-pot rod, and my invention applied tothe cut-oit' shaft; Fig. 3, a front elevation, and Fig. 4 a horizontal central cross-section, ofthe railing weight; Fig. 5, a front eleva-tion of the correction-arc (the cut-oit' shaft being in section) and two roller-weights supported on said arc. I

The'hollow stand A, the regulator-shaft B, the stop-collar C, arms D D E E, balls F F', sleeve G, sliding on regulator-shaft within the top of the stand, and raised by means of the collar H when the balls are thrown outward and prevented from turning bythe guide-pin G', a regulatonrod, I, pivoted' to saidsleeve G, and to the doubie arm J, secured ou the cut-off shaft K, said shaft being supported and turning on the bracket A on said stand, the other end oi' said arm J being pivoted to the end ofthe dash-pot rod Q. Other arms, L L, secured to said cut-off 'shaft and pivoted to the cut-off rods M M, which operate the cut-off valves, gears O O, and pulley P, are all of the usual construction and operation. In the case of a steam-engine providedwith the parts above named I apply to the cut-off shaft K a curved double arm, N, which I call a correctionarc, the upper surface of which is oi uniform width, and is curved upward lengthwise from the middle in each direction, like the arc of a circle, said arc being provided with ahole which receives the shaft K, and with a setscrew, a, which thrusts against the shaft K and prevents the arc from turning on said shaft. The upper surface of the are' N serves as a trachfor a rolling weight, W. This weight is cylindricah and is provided with an annular groove, W", of the width of the arm, so-that the sides YV2 XV? of the groove, or, in other words, the flanges of the weight, will prevent the weight from running off the side of the arc, and the ends of the arc are provided with hooks N', which prevent the weight from roll: ing oft said ends. The hooks N are preferably curved on their inner faces to iit said weight. rEhe arc is so adjusted on the shaft K by means of the set-screw n that with an average .load the weight WV will stand directly over said shaft. The weight is provided with a central opening, as shown in Fig. 4, which is closed at each end by caps XV, which are iianged at RV, said iianges iittingagainst the shoulders YV, and are held in position by the screw WV, which passes through one of said caps and screws into the other. In the chamber thus iormed in the weight XV disks "V7, of heavy material, preferably lead, maybe placed according as a heavier or lighter weight is required. XVhen the steam-pressure rises or the load decreases, the speed of the engine is slightly increased, and consequently the governor balls ily outward, and by the usual means above mentioned rock the shaft K, thereby depressing the end o f the arc N farthest from the stand, and causing the weight to roll toward the last-named end of said arc, and immediately augmenting the action of the governor' in cutting ofi' the steam at an earlier Vpart of the stroke, and of course 'immediately reducing the speed. On the other hand, when the steam-pressure decreases or the load increases, the action of the governor in increas` ing the amount of steam admitted to the cylinder is augmented by the weight rolling in the other direction-that is, to the left in Fig. l-because the arc will then be tilted in the direction last named. The gravity of the rolling weight and the curvature of the arc may be so adjusted that the variation of speed will be so slight as to be imperceptible in several hours, even with a great variation of load.

In Fig. 5 two weights are used. The use of two such weights on the same arc is desirable IOO where there is a very sudden variation of the load, because the slight-,friction between the surface of the Weights will prevent their rolling too far with a sudden movement of the governor.

The are and rolling` weight herein described may be used in connection with a throttlingvalve, and with any forni of power-governor which can be made to rook a shaft by the variation of lche speed of sueh governor.

I claim as my invention- 1. The combination of a speedgovernor, a shaft, means of rocking` the same by the variation of the speed of said governor, a Correction-are secured to said shaft, and a weight; provided with iianges, as and for the purpose specified.

2. The combination of a speed-governor, a shaft, means of rocking the saine by the varat'ion of the speed of said governor, a eorrec- `tion-aro secured to said shaft and provided with hooks, and a weight adapted to roll upon said arc, as and for Aehe purpose specified.

3. The combination of a speed-governor, la shaft, means of rocking the saine bythe variation of lche speed of said governor, a correetion-arc secured to said shaft', aweight adapted to roll upon said are, and means of varying material, as and for the purpose specified.

FRANK A. GALE. Witnesses:

ALBERT M. MOORE, EDW. W. Tiroirrson. 

